diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8ad6f8a5f..d6a00604e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,5 +1,5 @@
 default:
-  image: registry.znuny.com/docker/zammad-ci:2.7.4
+  image: $CI_REGISTRY/docker/zammad-ci:2.7.4
 
 include:
   - local: '/.gitlab/ci/base.yml'
diff --git a/.gitlab/ci/base.yml b/.gitlab/ci/base.yml
index 9f5c65042..2c999e26c 100644
--- a/.gitlab/ci/base.yml
+++ b/.gitlab/ci/base.yml
@@ -74,35 +74,35 @@
 
 # DB Docker
 .docker_mysql: &docker_mysql
-  name: registry.znuny.com/docker/zammad-mysql:stable
+  name: $CI_REGISTRY/docker/zammad-mysql:stable
   alias: mysql
 
 .docker_postgresql: &docker_postgresql
-  name: registry.znuny.com/docker/zammad-postgresql:stable
+  name: $CI_REGISTRY/docker/zammad-postgresql:stable
   alias: postgresql
 
 .docker_elasticsearch: &docker_elasticsearch
-  name: registry.znuny.com/docker/zammad-elasticsearch:$ELASTICSEARCH_TAG
+  name: $CI_REGISTRY/docker/zammad-elasticsearch:$ELASTICSEARCH_TAG
   alias: elasticsearch
 
 .docker_selenium_chrome: &docker_selenium_chrome
-  name: registry.znuny.com/docker/zammad-selenium-chrome:stable
+  name: $CI_REGISTRY/docker/zammad-selenium-chrome:stable
   alias: selenium-chrome
 
 .docker_selenium_firefox: &docker_selenium_firefox
-  name: registry.znuny.com/docker/zammad-selenium-firefox:stable
+  name: $CI_REGISTRY/docker/zammad-selenium-firefox:stable
   alias: selenium-firefox
 
 .docker_imap: &docker_imap
-  name: registry.znuny.com/docker/zammad-imap:stable
+  name: $CI_REGISTRY/docker/zammad-imap:stable
   alias: mail
 
 .docker_redis: &docker_redis
-  name: registry.znuny.com/docker/zammad-redis:stable
+  name: $CI_REGISTRY/docker/zammad-redis:stable
   alias: redis
 
 .docker_memcached: &docker_memcached
-  name: registry.znuny.com/docker/zammad-memcached:stable
+  name: $CI_REGISTRY/docker/zammad-memcached:stable
   alias: memcached
   command: ["memcached", "-m", "256M"]
 
diff --git a/.gitlab/ci/browser-integration/otrs_chrome.yml b/.gitlab/ci/browser-integration/otrs_chrome.yml
index 6f96953aa..79ae8ed9a 100644
--- a/.gitlab/ci/browser-integration/otrs_chrome.yml
+++ b/.gitlab/ci/browser-integration/otrs_chrome.yml
@@ -7,11 +7,11 @@ otrs_chrome:
     IMPORT_OTRS_ENDPOINT: "http://zammad-ci-otrsimport-app/otrs/public.pl?Action=ZammadMigrator"
     TZ: "Europe/Berlin"       # Required for the zammad-ci-otrsimport-app containers
   services:
-    - name: registry.znuny.com/docker/zammad-postgresql:stable
+    - name: $CI_REGISTRY/docker/zammad-postgresql:stable
       alias: postgresql
-    - name: registry.znuny.com/docker/zammad-selenium-chrome:stable
+    - name: $CI_REGISTRY/docker/zammad-selenium-chrome:stable
       alias: selenium-chrome
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-db:otrs6
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-db:otrs6
       alias: zammad-ci-otrsimport-db
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-app:otrs6
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-app:otrs6
       alias: zammad-ci-otrsimport-app
diff --git a/.gitlab/ci/integration/otrs.yml b/.gitlab/ci/integration/otrs.yml
index 2eddc231e..040520306 100644
--- a/.gitlab/ci/integration/otrs.yml
+++ b/.gitlab/ci/integration/otrs.yml
@@ -12,71 +12,71 @@
 otrs:6:
   <<: *template_integration_otrs
   services:
-    - name: registry.znuny.com/docker/zammad-mysql:stable
+    - name: $CI_REGISTRY/docker/zammad-mysql:stable
       alias: mysql
-    - name: registry.znuny.com/docker/zammad-postgresql:stable
+    - name: $CI_REGISTRY/docker/zammad-postgresql:stable
       alias: postgresql
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-db:otrs6
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-db:otrs6
       alias: zammad-ci-otrsimport-db
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-app:otrs6
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-app:otrs6
       alias: zammad-ci-otrsimport-app
 
 otrs:5:
   <<: *template_integration_otrs
   services:
-    - name: registry.znuny.com/docker/zammad-mysql:stable
+    - name: $CI_REGISTRY/docker/zammad-mysql:stable
       alias: mysql
-    - name: registry.znuny.com/docker/zammad-postgresql:stable
+    - name: $CI_REGISTRY/docker/zammad-postgresql:stable
       alias: postgresql
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-db:otrs5
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-db:otrs5
       alias: zammad-ci-otrsimport-db
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-app:otrs5
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-app:otrs5
       alias: zammad-ci-otrsimport-app
 
 otrs:4:
   <<: *template_integration_otrs
   services:
-    - name: registry.znuny.com/docker/zammad-mysql:stable
+    - name: $CI_REGISTRY/docker/zammad-mysql:stable
       alias: mysql
-    - name: registry.znuny.com/docker/zammad-postgresql:stable
+    - name: $CI_REGISTRY/docker/zammad-postgresql:stable
       alias: postgresql
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-db:otrs4
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-db:otrs4
       alias: zammad-ci-otrsimport-db
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-app:otrs4
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-app:otrs4
       alias: zammad-ci-otrsimport-app
 
 otrs:33:
   <<: *template_integration_otrs
   services:
-    - name: registry.znuny.com/docker/zammad-mysql:stable
+    - name: $CI_REGISTRY/docker/zammad-mysql:stable
       alias: mysql
-    - name: registry.znuny.com/docker/zammad-postgresql:stable
+    - name: $CI_REGISTRY/docker/zammad-postgresql:stable
       alias: postgresql
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-db:otrs33
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-db:otrs33
       alias: zammad-ci-otrsimport-db
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-app:otrs33
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-app:otrs33
       alias: zammad-ci-otrsimport-app
 
 otrs:32:
   <<: *template_integration_otrs
   services:
-    - name: registry.znuny.com/docker/zammad-mysql:stable
+    - name: $CI_REGISTRY/docker/zammad-mysql:stable
       alias: mysql
-    - name: registry.znuny.com/docker/zammad-postgresql:stable
+    - name: $CI_REGISTRY/docker/zammad-postgresql:stable
       alias: postgresql
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-db:otrs32
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-db:otrs32
       alias: zammad-ci-otrsimport-db
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-app:otrs32
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-app:otrs32
       alias: zammad-ci-otrsimport-app
 
 otrs:31:
   <<: *template_integration_otrs
   services:
-    - name: registry.znuny.com/docker/zammad-mysql:stable
+    - name: $CI_REGISTRY/docker/zammad-mysql:stable
       alias: mysql
-    - name: registry.znuny.com/docker/zammad-postgresql:stable
+    - name: $CI_REGISTRY/docker/zammad-postgresql:stable
       alias: postgresql
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-db:otrs31
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-db:otrs31
       alias: zammad-ci-otrsimport-db
-    - name: registry.znuny.com/docker/zammad-ci-otrsimport-app:otrs31
+    - name: $CI_REGISTRY/docker/zammad-ci-otrsimport-app:otrs31
       alias: zammad-ci-otrsimport-app